5.3 Measurement specifications
151
External Current Sensor Input Specifications (CURRENT SENSOR)
Response time Level output: 0.6 sec. or less (when the input changes abruptly from 0% to 90%, or from
100% to 10%, the time required in order to satisfy the accuracy range with a synchroni-
zation timeout setting of 0.1 s)
Waveform output: 0.2 ms or less
High-speed active power level output: 1 cycle
Temperature coefficient ±0.05% f.s./°C or less
Output resistance 100 Ω ±5 Ω
Terminal Isolated BNC terminals, 1 for each channel
Input method Isolated input from a voltage-output external current sensor (instrument’s external cur-
rent sensor input terminals are not isolated)
Current sensor type
switching
OFF/ TYPE1/ TYPE2
When set to off, input from the external current sensor input terminal is ignored.
Current sensor options Supported current sensors
TYPE1/
9661 Clamp on Sensor (rating: 500 A AC)
9669 Clamp on Sensor (rating: 1,000 A AC)
9660 Clamp on Sensor (rating: 100 A AC)
CT9667 Flexible Clamp on Sensor (rating: 500 A/5,000 A AC)
TYPE2
9555-10 Sensor Unit
L9217 Connection Cord
9272-10 Clamp on Sensor (rating: 20 A/200 A AC)
9277 Universal Clamp on CT (rating: 20 A AC/DC)
9278 Universal Clamp on CT (rating: 200 A AC/DC)
9279 Universal Clamp ON CT (rating: 500 A AC/DC)
9709 AC/DC Current Sensor (rating: 500 A AC/DC)
CT6862 AC/DC Current Sensor (rating: 50 A AC/DC)
CT6863 AC/DC Current Sensor (rating: 200 A AC/DC)
CT6865 AC/DC Current Sensor (rating: 1,000 A AC/DC)
Temperature coefficient Voltage: ±0.03% f.s./°C
Current, active power: ±0.08% f.s./°C (instrument temperature coefficient; f.s.: instru-
ment measurement range)
Add current sensor temperature coefficient to above.
Power factor effects Instrument: ±0.15% f.s. or less (45 Hz to 66 Hz with power factor = 0)
Internal circuit voltage/current phase difference: ±0.0859°
Add the current sensor phase accuracy to the internal circuit voltage/current phase dif-
ference noted above.
Current peak value measure-
ment accuracy
(External current sensor input instrument accuracy) + (±2.0% f.s.) (f.s.: current peak
range)
Add the current sensor accuracy to the above.
Current measurement range Auto/ 10 A/ 20 A/ 50 A (range noted on panel)
User-selectable for each wiring mode. Can be read directly by manually setting the CT
ratio.
Power range configuration Can be set separately for each wiring mode.
For wiring modes other than 1P2W, sum power range (power ranges for individual
channels are the same as 1P2W)
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